Good discussion...and some interesting answers. Sorry to read of Softride62's issues, but I certainly will be disappointed if my 570 isn't more reliable with less required maintenance than my 470.
Though I maintain religiously, by 240K I had not only done the 470's timing belt/water pump twice, and starter contacts once, and repacked front wheel bearings four times, and replaced CV joints once, and replaced CV boots twice, but had electric mirrors and seat heater fixed, some other small stuff I don't remember repaired, and had replaced the tranny at 160K due to the model year 2000 bearing failure. Oh, also had to replace the exhaust manifolds with headers due to cracks. A great truck, but far from infallible.
Assuming a solid transmission in my 570, I'm already ahead due to lack of timing belt and maintenance free front bearings. At ~50K, I've had zero problems.
If you can get maintenance history for the '08 570, or get a good mechanic to check it out, it might be a good move. Same mileage, more power, modern safety features, no timing belt, etc.
BTW - the Automatic Height Control (AHC) is hydraulic, not pneumatic, and my 2000 470's AHC worked flawlessly for 15 years and 240K miles. I did a lot of towing with that truck, as well as wheeling, and used the AHC often. I flushed the fluid every 60K per the schedule and had no problems. I expect same with the 570.
